Qur'an 3:171
۞ يَسْتَبْشِرُونَ بِنِعْمَةٍ مِّنَ ٱللَّهِ وَفَضْلٍ وَأَنَّ ٱللَّهَ لَا يُضِيعُ أَجْرَ ٱلْمُؤْمِنِينَ
“They receive good tidings of favor from Allāh and bounty and [of the fact] that Allāh does not allow the reward of believers to be lost -”
Aal-i-Imraan 3:171 · Saheeh International